Philip Alexander "Alex" Gibney (born October 23, 1953) is an American documentary film director and producer. In 2010, Esquire magazine said Gibney "is becoming the most important documentarian of our time".[1]

[The Exterminating Angel is] dark, but it's also wickedly funny and mysterious in ways that can’t be reduced to a simple, analytical explanation. I always thought that's what's great about movies sometimes—the best movies have to be experienced; they can’t just be written about.[4]

Gibney is president of Jigsaw Productions, which produces independent films, music documentaries, and TV mini-series. He has been honored by the Yale Film Studies program for his contributions to film culture. In 2010, Utne Reader listed Gibney as one of "25 Visionaries Who Are Changing Your World."[6]

His recent film, We Steal Secrets: The Story of WikiLeaks, is a comprehensive look at WikiLeaks, Julian Assange, and Chelsea Manning. The Wikileaks organization itself has objected to the way Gibney portrayed it, and has posted a line-by-line rebuttal to the entire film.[7]

On June 19, 2008, Gibney's company filed for arbitration, arguing that THINKFilm failed to properly distribute and promote his film Taxi to the Dark Side.[9][10] He is suing for over a million dollars in damages. He stated that the film has grossed only $280,000.